docs: def close_children_tasks(self, parent_task_name):
          """
          Closes all the children tasks that were open
  
          Args:
              parent_task_name (str): Name of the parent task
  
          Returns:
              None
          """
          if parent_task_name not in self.tasks:
              return
  
          while self.tasks:
              next_task = reversed(self.tasks.keys()).next()
              if next_task == parent_task_name:
                  break
              del self.tasks[next_task]